Block-molding machine.



W. A. BOEGK.

BLOCK MOLDING MACHINE. 41 PLI0ATI0R FILED Mn 24. 1m.

PATENTEDAPR. 2, 1907.

z SHEETS-SEEM 1.-

INVENTOR.

A Tram/. 5 v5 UNTTET) STATES PATENT @EETGE.

WILLIAM A. BOEOK, OF SOUTH OMAHA, NEBRASKA.

BLOCK-MOLDING MACHINE.

Specification of Letters Patent.

katented April 2, 1907.

Application filed May 24,1906. Serial No. 318,574.

To ctZZ whom it may concern.-

Be it known that 1, WILLIAM A. BOEOK, a citizen of the United States, residing at South Omaha, in the county of Douglas and State of Nebraska, have invented a new and useful Block-Molding Machine, of which the following is a specification.

This invention relates to apparatus employed in the construction of building blocks or bricks from concrete and similar plastic compounds, and has for its principal object to provide a mold-box of simple construction from which the finished blocks may be removed without danger of injury.

A further object of the invention is to construct a mold-box in which the pallets are provided with supporting wheels or rollers, so that they may be removed together with the finished blocks without danger of breaking. or otherwise damaging the blocks, the manual labor now necessary in handling the blocks made in machines of the ordinary type being altogether eliminated.

A still further object of the invention is to provide a machine which may be readily adjusted for the manufacture of bricks of different design and different shape and size.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a perspective view of a block-molding machine constructed in accordance with the invention. Fig. 2 is a transverse sectional view of the same, showing the mold turned at an angle of ninety degrees from block-forming position and in readiness to discharge the block. Fig. 3 shows the finished block resting on the wheeled pallet and in transit to the drying-floor. Fig. 4 is a transverse sectional view of the mold adjusted for the formation of blocks of a different type. Fig. 5 is a de tail perspective view of one form of mold-box fastening which maybe employed. Fig. 6 is a similar view showing a modified construction of mold-box fastening. Fig. 7 is a detail view of the block made by the mold-box when the latter is adjusted as in Fig. 2. Fig. 8 is a similar view of the block made with the mold-box adjusted as shown in Fig. 4. Fig. 9 is a detail perspective view of a movable partition-plate which may be employed where sectional blocks are to be made.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings;

The mold-box in the present instance comprises a bottom member 10, a front plate 11, a rear plate or pallet 12, and two end plates 13. The bottom 10 serves to shape that portion of the block which subsequently forms the front or exposed face, and the bottom plates being readily detachable may be interchanged as desired for the molding of blocks of different design. By molding the block face downward the tamping will force the plastic material into all the interstices or depressions of the face-plate and a perfect lock will be made. The structure at the same time is such that a cement or cement mixture of fine quality may be first tamped into the bottom of the mold to form the face of the block and then a coarser grade of concrete or other material employed to form the body of the block.

The bottom plate is preferably provided with a marginal flange 14 for the reception of the lower edges of the front, rear, and end plates, and in the upper edges of said front and back plates are notches 17, arranged for the reception of a rod 18, having recesses for the reception of clips 20, secured to the end members. The rear end of each rod is provided with a finger 21, which may be turned to engage against the outer surface.

Near the front end of the rod is a recess 19, which may be engaged by a clip 20, that is carried by the front plate of the mold-box. The front end of the rod is bent to form a loop-like handle 21*, which is turned to the horizontal position (shown in Fig. 1 )to lock the parts of the mold-box together, and when turned to this position the two handles are connected by a hook-bar 21 so that accidental turning of the handle and unlocking of the mold-box will be avoided. Where this construction is used, the handles 21 may be employed in turning the mold-box from the position shown in Fig. 1 to the position shown in Fig. 2, and as the front plate and two end plates are locked together when the clip is turned to operative position all three of these plates may be removed together. The construction may also be modified in the manner shown in Fig. 6, wherein the front and end plates are pro vided with slots 22 for the passage of a lock ing-key 23, having enlarged heads 24, which may be turned to positions across the narrowest portions of the slots, and thus lock the front and rear plates together.

The rear plate 12, which constitutes the pallet on which -the block remains after the mold-box has been opened, is provided with a rear bar'or plate 25, having openings for the reception of the pintles 26 of supportingrollers 27, and when the mold-box has been turned from molding position to the discharging position (shown in Fig. 2) this wheeled pallet will receive the block, and then after the remaining ortion of the mold has been detached the palIet may be traveled along an inclined way by gravity to a suitable drying-floor, thus avoiding the severe manual labor incident to the handling of blocks in the ordinary manner.

The front plate 11 of the mold-box is provided with a number of openings 29, 30, 31, and 32, and the walls of these openings are tapered, as indicated in Fig. 2, so that when necessary filling-plates 33 may be laced in position from the inside of the mold box and then locked by suitable catches or turnbuckles 34, while the tapered walls of the openings and the correspondingly-tapered walls of thefilling-plates will prevent outward displacement of the latter during the tamping of the plastic material.

The mold is designed for the manufacture of two different forms of blocks, both of which are frost-proof and damp-proof, the structure in both cases being such that there can be no direct passage from front to rear of the block through the solid material without traversing an air-space. In the construction shown in Fig. 7 there are three air-spaces, one traversing the body of the block and the other being formed at the ends thereof, so that any direct line between thetwo faces of the block at any point must traverse in each one of these air-spaces. In the construction shown in Fig. 8 the block is formed of two sections united by tie-rods 3c, and in this case there is, of course, no possibility of frost or damp striking through in view of the continuous air-space.

l/Vhere blocks of the type shown in Fig. 7 are to be made, the filling-plates 33 are removed, and after the. material has been filled in and tamped to a proper level the lower core 36 is inserted through the opening 31, and pins 37 at the end of the core are arranged to extend into openings formed in the rear plate or pallet member. The material is then filled in and tamped up to the level of the upper openings 29 and and then the cores 38 are inserted, these cores be ing also provided with pins 37. After the box has been filled and the surplus material troweled off the box is turned away from the operator to the extent of a quarter of a revolution, so that the wheeled pallet becomes the bottom member of the mold-box. To facilitate this operation, the side plates are provided with thumb-pieces 40, and the ends of the bottom member 10 are provided with projecting finger-strips 40, so that the mold-box may be readily turned. The thumb-pieces and finger-strips may be utilized where it is not desired to employ the handles 21" in turning the box, and especially where the fastening is of such nature that the handle members are small. After turning to the position shown in Fig. 2 the cores are withdrawn, and then the catches 16 are released to permit the removal of the bottom, front, and end members, after which the wheeled pallet carrying the finished block may be run by gravity over a suitable inclined way to the drying-floor, as shown in Fig. 3.

Where blocks of the type shown in Fig. 8 are to be made, the openings 29, 30, and 31 are filled by the plates 33 and strips 41 are secured to the pallet and to the end members with their upper edges in alinement with the opening 32 in the front plate. The material which forms the lower half of the block; is then filled in and tamped, after which the tierods 00 are pushed down in place, and then the lower board or core member 43 is forced through the opening 32 and is supported by the strips 41, and said plate is provided with suitable slots to permit its passage around the tie-rods 0c. The material which forms the upper half of the block is then filled in and tamped and after being troweled off the box is turned as before, and after the plate 43 has been drawn out the mold is opened, allowing the finished block to rest on the supporting-pallet.

In some cases it may be desired to form half, quarter, or other sectional blocks, and for this purpose a partition-plate is employed, such plate being provided with catches 51, that are arranged to be engaged by the back and front lates of the mold-box, the latter being pre erably provided with notches for the reception of said catches.

1. A mold-box including a bottom member, front and rear plates and end plates, the front plate having an elongated opening for the insertion of a secondary bottom board, and rear and end plates provided with detachable strips for the support of said bottom board.

2. In a mold-box, a bottom member, front and rear plates and end plates, the front and rear plates having notches near their opposite ends, locking-bars extending through the notches and provided at one end In testimony that I claim the foregoing as With looped handles, clips engaging recessed my own I have hereto afiiXed my signature in portions of the locking-bars and secured to the presence of two Witnesses.

the end plates, pivotally-mounted clips car- WILLIAM A. BOECK. 5 ried by the front plate and arranged to en- Witnesses:

ter notches of the locking-bar, and a hook A. A. WRIGHT,

for locking the handles to each other. HARRY B. FLEHARTY. 

